+++ /dev/null
- GNU GENERAL PUBLIC LICENSE
- Version 2, June 1991
-
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.
- 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
- Preamble
-
- The licenses for most software are designed to take away your
-freedom to share and change it. By contrast, the GNU General Public
-License is intended to guarantee your freedom to share and change free
-software--to make sure the software is free for all its users. This
-General Public License applies to most of the Free Software
-Foundation's software and to any other program whose authors commit to
-using it. (Some other Free Software Foundation software is covered by
-the GNU Library General Public License instead.) You can apply it to
-your programs, too.
-
- When we speak of free software, we are referring to freedom, not
-price. Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-this service if you wish), that you receive source code or can get it
-if you want it, that you can change the software or use pieces of it
-in new free programs; and that you know you can do these things.
-
- To protect your rights, we need to make restrictions that forbid
-anyone to deny you these rights or to ask you to surrender the rights.
-These restrictions translate to certain responsibilities for you if you
-distribute copies of the software, or if you modify it.
-
- For example, if you distribute copies of such a program, whether
-gratis or for a fee, you must give the recipients all the rights that
-you have. You must make sure that they, too, receive or can get the
-source code. And you must show them these terms so they know their
-rights.
-
- We protect your rights with two steps: (1) copyright the software, and
-(2) offer you this license which gives you legal permission to copy,
-distribute and/or modify the software.
-
- Also, for each author's protection and ours, we want to make certain
-that everyone understands that there is no warranty for this free
-software. If the software is modified by someone else and passed on, we
-want its recipients to know that what they have is not the original, so
-that any problems introduced by others will not reflect on the original
-authors' reputations.
-
- Finally, any free program is threatened constantly by software
-patents. We wish to avoid the danger that redistributors of a free
-program will individually obtain patent licenses, in effect making the
-program proprietary. To prevent this, we have made it clear that any
-patent must be licensed for everyone's free use or not licensed at all.
-
- The precise terms and conditions for copying, distribution and
-modification follow.
-\f
- GNU GENERAL PUBLIC LICENSE
- TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-
- 0. This License applies to any program or other work which contains
-a notice placed by the copyright holder saying it may be distributed
-under the terms of this General Public License. The "Program", below,
-refers to any such program or work, and a "work based on the Program"
-means either the Program or any derivative work under copyright law:
-that is to say, a work containing the Program or a portion of it,
-either verbatim or with modifications and/or translated into another
-language. (Hereinafter, translation is included without limitation in
-the term "modification".) Each licensee is addressed as "you".
-
-Activities other than copying, distribution and modification are not
-covered by this License; they are outside its scope. The act of
-running the Program is not restricted, and the output from the Program
-is covered only if its contents constitute a work based on the
-Program (independent of having been made by running the Program).
-Whether that is true depends on what the Program does.
-
- 1. You may copy and distribute verbatim copies of the Program's
-source code as you receive it, in any medium, provided that you
-conspicuously and appropriately publish on each copy an appropriate
-copyright notice and disclaimer of warranty; keep intact all the
-notices that refer to this License and to the absence of any warranty;
-and give any other recipients of the Program a copy of this License
-along with the Program.
-
-You may charge a fee for the physical act of transferring a copy, and
-you may at your option offer warranty protection in exchange for a fee.
-
- 2. You may modify your copy or copies of the Program or any portion
-of it, thus forming a work based on the Program, and copy and
-distribute such modifications or work under the terms of Section 1
-above, provided that you also meet all of these conditions:
-
- a) You must cause the modified files to carry prominent notices
- stating that you changed the files and the date of any change.
-
- b) You must cause any work that you distribute or publish, that in
- whole or in part contains or is derived from the Program or any
- part thereof, to be licensed as a whole at no charge to all third
- parties under the terms of this License.
-
- c) If the modified program normally reads commands interactively
- when run, you must cause it, when started running for such
- interactive use in the most ordinary way, to print or display an
- announcement including an appropriate copyright notice and a
- notice that there is no warranty (or else, saying that you provide
- a warranty) and that users may redistribute the program under
- these conditions, and telling the user how to view a copy of this
- License. (Exception: if the Program itself is interactive but
- does not normally print such an announcement, your work based on
- the Program is not required to print an announcement.)
-\f
-These requirements apply to the modified work as a whole. If
-identifiable sections of that work are not derived from the Program,
-and can be reasonably considered independent and separate works in
-themselves, then this License, and its terms, do not apply to those
-sections when you distribute them as separate works. But when you
-distribute the same sections as part of a whole which is a work based
-on the Program, the distribution of the whole must be on the terms of
-this License, whose permissions for other licensees extend to the
-entire whole, and thus to each and every part regardless of who wrote it.
-
-Thus, it is not the intent of this section to claim rights or contest
-your rights to work written entirely by you; rather, the intent is to
-exercise the right to control the distribution of derivative or
-collective works based on the Program.
-
-In addition, mere aggregation of another work not based on the Program
-with the Program (or with a work based on the Program) on a volume of
-a storage or distribution medium does not bring the other work under
-the scope of this License.
-
- 3. You may copy and distribute the Program (or a work based on it,
-under Section 2) in object code or executable form under the terms of
-Sections 1 and 2 above provided that you also do one of the following:
-
- a) Accompany it with the complete corresponding machine-readable
- source code, which must be distributed under the terms of Sections
- 1 and 2 above on a medium customarily used for software interchange; or,
-
- b) Accompany it with a written offer, valid for at least three
- years, to give any third party, for a charge no more than your
- cost of physically performing source distribution, a complete
- machine-readable copy of the corresponding source code, to be
- distributed under the terms of Sections 1 and 2 above on a medium
- customarily used for software interchange; or,
-
- c) Accompany it with the information you received as to the offer
- to distribute corresponding source code. (This alternative is
- allowed only for noncommercial distribution and only if you
- received the program in object code or executable form with such
- an offer, in accord with Subsection b above.)
-
-The source code for a work means the preferred form of the work for
-making modifications to it. For an executable work, complete source
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-compelled to copy the source along with the object code.
-\f
- 4. You may not copy, modify, sublicense, or distribute the Program
-except as expressly provided under this License. Any attempt
-otherwise to copy, modify, sublicense or distribute the Program is
-void, and will automatically terminate your rights under this License.
-However, parties who have received copies, or rights, from you under
-this License will not have their licenses terminated so long as such
-parties remain in full compliance.
-
- 5. You are not required to accept this License, since you have not
-signed it. However, nothing else grants you permission to modify or
-distribute the Program or its derivative works. These actions are
-prohibited by law if you do not accept this License. Therefore, by
-modifying or distributing the Program (or any work based on the
-Program), you indicate your acceptance of this License to do so, and
-all its terms and conditions for copying, distributing or modifying
-the Program or works based on it.
-
- 6. Each time you redistribute the Program (or any work based on the
-Program), the recipient automatically receives a license from the
-original licensor to copy, distribute or modify the Program subject to
-these terms and conditions. You may not impose any further
-restrictions on the recipients' exercise of the rights granted herein.
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-
- 7. If, as a consequence of a court judgment or allegation of patent
-infringement or for any other reason (not limited to patent issues),
-conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
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-distribute so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you
-may not distribute the Program at all. For example, if a patent
-license would not permit royalty-free redistribution of the Program by
-all those who receive copies directly or indirectly through you, then
-the only way you could satisfy both it and this License would be to
-refrain entirely from distribution of the Program.
-
-If any portion of this section is held invalid or unenforceable under
-any particular circumstance, the balance of the section is intended to
-apply and the section as a whole is intended to apply in other
-circumstances.
-
-It is not the purpose of this section to induce you to infringe any
-patents or other property right claims or to contest validity of any
-such claims; this section has the sole purpose of protecting the
-integrity of the free software distribution system, which is
-implemented by public license practices. Many people have made
-generous contributions to the wide range of software distributed
-through that system in reliance on consistent application of that
-system; it is up to the author/donor to decide if he or she is willing
-to distribute software through any other system and a licensee cannot
-impose that choice.
-
-This section is intended to make thoroughly clear what is believed to
-be a consequence of the rest of this License.
-\f
- 8. If the distribution and/or use of the Program is restricted in
-certain countries either by patents or by copyrighted interfaces, the
-original copyright holder who places the Program under this License
-may add an explicit geographical distribution limitation excluding
-those countries, so that distribution is permitted only in or among
-countries not thus excluded. In such case, this License incorporates
-the limitation as if written in the body of this License.
-
- 9. The Free Software Foundation may publish revised and/or new versions
-of the General Public License from time to time. Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
-Each version is given a distinguishing version number. If the Program
-specifies a version number of this License which applies to it and "any
-later version", you have the option of following the terms and conditions
-either of that version or of any later version published by the Free
-Software Foundation. If the Program does not specify a version number of
-this License, you may choose any version ever published by the Free Software
-Foundation.
-
- 10. If you wish to incorporate parts of the Program into other free
-programs whose distribution conditions are different, write to the author
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-make exceptions for this. Our decision will be guided by the two goals
-of preserving the free status of all derivatives of our free software and
-of promoting the sharing and reuse of software generally.
-
- NO WARRANTY
-
- 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
-FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
-OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
-PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
-OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
-MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
-TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
-PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
-REPAIR OR CORRECTION.
-
- 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
-REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
-INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
-OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
-TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
-YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
-PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGES.
-
- END OF TERMS AND CONDITIONS
-\f
- How to Apply These Terms to Your New Programs
-
- If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
- To do so, attach the following notices to the program. It is safest
-to attach them to the start of each source file to most effectively
-convey the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
- <one line to give the program's name and a brief idea of what it does.>
- Copyright (C) <year> <name of author>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-
-
-Also add information on how to contact you by electronic and paper mail.
-
-If the program is interactive, make it output a short notice like this
-when it starts in an interactive mode:
-
- Gnomovision version 69, Copyright (C) year name of author
- Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
- This is free software, and you are welcome to redistribute it
- under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License. Of course, the commands you use may
-be called something other than `show w' and `show c'; they could even be
-mouse-clicks or menu items--whatever suits your program.
-
-You should also get your employer (if you work as a programmer) or your
-school, if any, to sign a "copyright disclaimer" for the program, if
-necessary. Here is a sample; alter the names:
-
- Yoyodyne, Inc., hereby disclaims all copyright interest in the program
- `Gnomovision' (which makes passes at compilers) written by James Hacker.
-
- <signature of Ty Coon>, 1 April 1989
- Ty Coon, President of Vice
-
-This General Public License does not permit incorporating your program into
-proprietary programs. If your program is a subroutine library, you may
-consider it more useful to permit linking proprietary applications with the
-library. If this is what you want to do, use the GNU Library General
-Public License instead of this License.
+++ /dev/null
-/* -*- c-file-style: "gnu" -*-
- * ostree-init.c - switch to new root directory and start init.
- * Copyright 2011 Colin Walters <walters@verbum.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
-#define _GNU_SOURCE
-#include <sys/mount.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/param.h>
-#include <fcntl.h>
-#include <assert.h>
-#include <stdio.h>
-#include <stdarg.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include <ctype.h>
-#include <dirent.h>
-
-#define INIT_PATH "/sbin/init"
-
-static int
-perrorv (const char *format, ...) __attribute__ ((format (printf, 1, 2)));
-
-static int
-perrorv (const char *format, ...)
-{
- va_list args;
- char buf[PATH_MAX];
- char *p;
-
- p = strerror_r (errno, buf, sizeof (buf));
-
- va_start (args, format);
-
- vfprintf (stderr, format, args);
- fprintf (stderr, ": %s\n", p);
- fflush (stderr);
-
- va_end (args);
-
- sleep (3);
-
- return 0;
-}
-
-static char *
-parse_arg (const char *cmdline, const char *arg)
-{
- const char *p;
- int arglen;
- char *ret = NULL;
- int is_eq;
-
- arglen = strlen (arg);
- assert (arglen > 0);
- is_eq = *(arg+arglen-1) == '=';
-
- p = cmdline;
- while (p != NULL)
- {
- if (!strncmp (p, arg, arglen))
- {
- const char *start = p + arglen;
- const char *end = strchr (start, ' ');
-
- if (!end)
- end = strchr (start, '\n');
-
- if (is_eq)
- {
- if (end)
- ret = strndup (start, end - start);
- else
- ret = strdup (start);
- }
- else if (!end || end == start)
- {
- ret = strdup (arg);
- }
- break;
- }
- p = strchr (p, ' ');
- if (p)
- p += 1;
- }
- return ret;
-}
-
-static char *
-get_file_contents (const char *path, size_t *len)
-{
- FILE *f = NULL;
- char *ret = NULL;
- int saved_errno;
- char *buf = NULL;
- size_t bytes_read;
- size_t buf_size;
- size_t buf_used;
-
- f = fopen (path, "r");
- if (!f)
- {
- saved_errno = errno;
- goto out;
- }
-
- buf_size = 1024;
- buf_used = 0;
- buf = malloc (buf_size);
- assert (buf);
-
- while ((bytes_read = fread (buf + buf_used, 1, buf_size - buf_used, f)) > 0)
- {
- buf_used += bytes_read;
- if (buf_size == buf_used)
- {
- buf_size *= 2;
- buf = realloc (buf, buf_size);
- assert (buf);
- }
- }
- if (bytes_read < 0)
- {
- saved_errno = errno;
- goto out;
- }
-
- ret = buf;
- buf = NULL;
- *len = buf_used;
- out:
- if (f)
- fclose (f);
- free (buf);
- errno = saved_errno;
- return ret;
-}
-
-int
-main(int argc, char *argv[])
-{
- const char *toproot_bind_mounts[] = { "/home", "/root", "/tmp", NULL };
- const char *ostree_bind_mounts[] = { "/var", NULL };
- const char *readonly_bind_mounts[] = { "/bin", "/etc", "/lib", "/sbin", "/usr",
- NULL };
- char *ostree_root = NULL;
- char *ostree_subinit = NULL;
- char srcpath[PATH_MAX];
- char destpath[PATH_MAX];
- struct stat stbuf;
- char **init_argv = NULL;
- char *cmdline = NULL;
- size_t len;
- int i;
- int mounted_proc = 0;
- char *tmp;
- int readonly;
-
- cmdline = get_file_contents ("/proc/cmdline", &len);
- if (!cmdline)
- {
- if (mount ("proc", "/proc", "proc", 0, NULL) < 0)
- {
- perrorv ("Failed to mount /proc");
- return 1;
- }
- cmdline = get_file_contents ("/proc/cmdline", &len);
- if (!cmdline)
- {
- perrorv ("Failed to read /proc/cmdline");
- return 1;
- }
- }
-
- fprintf (stderr, "ostree-init kernel cmdline: %s\n", cmdline);
- fflush (stderr);
-
- ostree_root = parse_arg (cmdline, "ostree=");
- ostree_subinit = parse_arg (cmdline, "ostree-subinit=");
-
- tmp = parse_arg (cmdline, "ro");
- readonly = tmp != NULL;
- free (tmp);
-
- if (!ostree_root)
- {
- fprintf (stderr, "No ostree= argument specified\n");
- exit (1);
- }
-
- if (!readonly)
- {
- if (mount ("/dev/root", "/", NULL, MS_MGC_VAL|MS_REMOUNT, NULL) < 0)
- {
- perrorv ("Failed to remount / read/write");
- exit (1);
- }
- }
-
- snprintf (destpath, sizeof(destpath), "/ostree/%s", ostree_root);
- if (stat (destpath, &stbuf) < 0)
- {
- perrorv ("Invalid ostree root '%s'", destpath);
- exit (1);
- }
-
- snprintf (destpath, sizeof(destpath), "/ostree/%s/var", ostree_root);
- if (mount ("/ostree/var", destpath, NULL, MS_BIND, NULL) < 0)
- {
- perrorv ("Failed to bind mount / to '%s'", destpath);
- exit (1);
- }
-
- snprintf (destpath, sizeof(destpath), "/ostree/%s/sysroot", ostree_root);
- if (mount ("/", destpath, NULL, MS_BIND, NULL) < 0)
- {
- perrorv ("Failed to bind mount / to '%s'", destpath);
- exit (1);
- }
-
- snprintf (destpath, sizeof(destpath), "/ostree/%s/dev", ostree_root);
- if (mount ("udev", destpath, "devtmpfs",
- MS_MGC_VAL | MS_NOSUID,
- "seclabel,relatime,size=1960040k,nr_inodes=49010,mode=755") < 0)
- {
- perrorv ("Failed to mount devtmpfs on '%s'", destpath);
- exit (1);
- }
-
- for (i = 0; toproot_bind_mounts[i] != NULL; i++)
- {
- snprintf (destpath, sizeof(destpath), "/ostree/%s%s", ostree_root, toproot_bind_mounts[i]);
- if (mount (toproot_bind_mounts[i], destpath, NULL, MS_BIND & ~MS_RDONLY, NULL) < 0)
- {
- perrorv ("failed to bind mount (class:toproot) %s to %s", toproot_bind_mounts[i], destpath);
- exit (1);
- }
- }
-
- for (i = 0; ostree_bind_mounts[i] != NULL; i++)
- {
- snprintf (srcpath, sizeof(srcpath), "/ostree/%s", ostree_bind_mounts[i]);
- snprintf (destpath, sizeof(destpath), "/ostree/%s%s", ostree_root, ostree_bind_mounts[i]);
- if (mount (srcpath, destpath, NULL, MS_MGC_VAL|MS_BIND, NULL) < 0)
- {
- perrorv ("failed to bind mount (class:bind) %s to %s", srcpath, destpath);
- exit (1);
- }
- }
-
- for (i = 0; readonly_bind_mounts[i] != NULL; i++)
- {
- snprintf (destpath, sizeof(destpath), "/ostree/%s%s", ostree_root, readonly_bind_mounts[i]);
- if (mount (destpath, destpath, NULL, MS_BIND, NULL) < 0)
- {
- perrorv ("failed to bind mount (class:readonly) %s", destpath);
- exit (1);
- }
- if (mount (destpath, destpath, NULL, MS_BIND | MS_REMOUNT | MS_RDONLY, NULL) < 0)
- {
- perrorv ("failed to bind mount (class:readonly) %s", destpath);
- exit (1);
- }
- }
-
- snprintf (destpath, sizeof(destpath), "/ostree/%s", ostree_root);
- if (chroot (destpath) < 0)
- {
- perrorv ("failed to change root to '%s'", destpath);
- exit (1);
- }
-
- if (chdir ("/") < 0)
- {
- perrorv ("failed to chdir to subroot");
- exit (1);
- }
-
- if (mounted_proc)
- (void)umount ("/proc");
-
- init_argv = malloc (sizeof (char*)*(argc+1));
- if (ostree_subinit)
- init_argv[0] = ostree_subinit;
- else
- init_argv[0] = INIT_PATH;
- for (i = 1; i < argc; i++)
- init_argv[i] = argv[i];
- init_argv[i] = NULL;
-
- fprintf (stderr, "ostree-init: Running real init %s (argc=%d)\n", init_argv[0], argc);
- fflush (stderr);
- execv (init_argv[0], init_argv);
- perrorv ("Failed to exec init '%s'", INIT_PATH);
- exit (1);
-}
-
projects / ostree.git / commitdiff